For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningRoof Side Rail Inflatable Restraint Module Replacement
Warning: In order to prevent SIR deployment, personal injury, or
unnecessary SIR system repairs, do not strike the door or the
door pillar in the area of the side impact sensor (SIS). Turn OFF the ignition
and remove the key when performing service in the
area of the SIS.
Warning: When pe ...
Strut Assembly Replacement
Special Tools
CH 49375 Wrench
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation.
Separate the brake hose ...
Doing Your Own Service Work
WARNING
It can be dangerous to work on your vehicle if you do not have the proper
knowledge, service manual, tools, or parts. Always follow owner manual procedures
and consult the service manual for your vehicle before doing any service work.
If doing some of your own service work, use the pro ...